Description
Roboxy NetCoreServer-authoritative multiplayer combat for Unreal Engine
Roboxy NetCore is a drop-in, data-driven combat framework that handles the hardest parts of a multiplayer shooter: authoritative firing, client prediction, server rewind, and precision per-bone hit validation even under high latency.
Add the components to the character you already have, implement a few interfaces, and you have a fully networked combat foundation.
No Gameplay Ability System. No engine modifications. No rewriting your character.
Full C++ source included.
Try it in a real multiplayer game with your friends
Want to see Roboxy NetCore running before integrating it into your own project?
Send me an email or contact me through Fab and I'll send you a Steam key for the Roboxy game.
Jump in, play it yourself, and experience the systems in a real multiplayer environment firing, prediction, server rewind, precision hit validation, health, shields, weapon switching, pickups, and more.
Roboxy is the game where NetCore was originally built and where I continue to integrate and test the framework in real gameplay.
Steam test keys are available on request.
Email: [email protected]
One Data Table drives every weapon
Your entire arsenal is controlled from a single Data Table.
Add one row per weapon and configure:
Hitscan, projectile, or shotgun
Auto, semi-auto, or burst
Damage, fire rate, range, spread, falloff
Clip size, reserve ammo, reload time
Projectile speed, gravity, lifetime, explosives
Per-bone damage and headshot multipliers
Weapon mesh, muzzle FX, impact FX, sounds, animations and camera shake
Network relevancy and per-weapon settings
Adding a new weapon means adding a row — not rebuilding your combat logic.
Competitive Server Rewind & Precision Hit Validation
The server records player history and rewinds targets to the moment the shooter actually saw them before validating the hit.
Hit validation goes beyond the character capsule. Head, torso and limbs can be resolved independently using configurable hit volumes, damage multipliers and priorities.
The included debug visualizer displays the live position, rewound position, trace, impact and bone hitboxes directly in-game.
Your game stays yours
Roboxy NetCore integrates through lightweight interfaces instead of depending on your game classes.
Your:
Character · Movement · Animations · UI · Input · Game Architecture
stay yours.
NetCore handles the multiplayer combat layer underneath.
What's included
Firing — authoritative hitscan/projectile combat, prediction, shotgun spread, trigger modes and falloff
Ammo — clip/reserve ammo, predicted reloads, auto reload and per-weapon ammo memory
Health & Shield — replicated damage, shield-first routing, regeneration, death, revive and killfeed events
Weapon Inventory — multi-slot loadouts, switching and automatic weapon-mesh updates
Weapon Pickups — pickup/drop flow, respawns, filtering and ammo persistence
Projectile Pooling — reusable networked projectiles with client-side predicted projectiles
Server Rewind & Hit Validation — historical rewind, per-bone validation and custom pawn support
Network Optimization — compact replication, relevancy controls and replication profiles
Debug Tools — structured logging and an in-game rewind/hitbox visualizer
Documentation & Tutorials
Roboxy NetCore includes a Quick Setup, detailed system tutorials, API documentation, component references, screenshots and troubleshooting guides.
The main components are covered individually in detailed tutorials. Weapon Pickups are demonstrated as part of the Quick Setup and are fully documented in the written guide.
📖 Documentation:
https://sezarkamleh.com/RoboxyNetCore
https://sezarkamleh.com/RoboxyNetCore/lag-compensation-setup
https://sezarkamleh.com/RoboxyNetCore/weapon-pickups
https://sezarkamleh.com/RoboxyNetCore/projectile-pool
https://sezarkamleh.com/RoboxyNetCore/weapon-inventory
https://sezarkamleh.com/RoboxyNetCore/health-shield
https://sezarkamleh.com/RoboxyNetCore/firing-ammo
Videos:
🎥 Health & Shield + UI API References
🎥Lag Componsation & Per Bone Damage
Documentation Guide:
Live SupportJoin the #roboxy-netcore-support channel on Discord:
You can also contact me directly:
Technical Details
Code Module: Roboxy_NetCore : Runtime
C++: Full source included
Network Replicated: Yes
Data-Driven Weapons: Yes
Supported Development Platform: Windows
Supported Target Platform: Windows
Engine Versions: Unreal Engine 5.3 – 5.8
Dependencies: Niagara
AI-assisted development tools were used during parts of the coding workflow. Roboxy NetCore, its architecture, gameplay systems, documentation, and the original Roboxy game were designed, developed, integrated, and tested by me.